60 years after the discovery of a transistor its operation is still based on the same physical principle of electrical manipulation and detection of electron’s charge in a semiconductor. Since we are quickly approaching the ultimate down-scaling limit it is now an eminent task to establish new physical principles of transistor operation. One extensively studied possibility is utilizing the second basic attribute of electron which is its spin. Theoretical proposal of electrical manipulation and detection of electron’s spin in semiconductors is 20 years old. However, its experimental realization turned out to be unexpectedly difficult. The FZU based team has engaged recently discovered quantum-relativistic phenomena for both spin manipulation and detection to realize the spin transistor and to demonstrate spin-logic operation. FZU was responsible for the work concept, experiments, theory.